PML\AML

wxd18781060112

请问谁有介绍pml、aml理论推导的资料，方便分享学习下嘛？介绍详细理论

lengxuef

VL的帮助文档里面就有。复制了部分内容，如下：

Perfectly Matched Layer Property
What is a perfectly matched layer (PML)?
An absorbing boundary layer is a layer of artificial absorbing material that is placed adjacent to the edges of the grid. This layer is completely independent of the boundary condition. When a wave enters the absorbing layer, it is attenuated by the absorption and it decays exponentially. Even if it reflects off the boundary, the returning wave after one round trip through the absorbing layer is exponentially tiny. The problem with this approach is that, whenever you have a transition from one material to another, the waves generally reflect. The transition from non-absorbing to absorbing material is not an exception to that rule, so instead of having the reflections from the grid boundary, you now have reflections from the absorber boundary. However, a special absorbing medium could be constructed, so that the waves don’t reflect at the interface. Such layer is called a perfectly matched layer (PML).

A Perfectly Matched Layer (PML) appends to the computational domain an artificial dissipative region in which the waves are attenuated. The main advantage of this technology is that it makes absolutely no assumption on the shape of the incident field. Therefore, the PML can be used both for near field and far field applications, and it is also used for waveguide problems (which is not the case for I-FEM). In practice the PML regions are discretized with standard FE elements and they completely belong to the FE mesh.

nimingming1135

可以参考如下链接，里面包含PML/AML的理论推导。
链接: http://pan.baidu.com/s/1jIlTstK 密码: tmku